describe HIGH QUALITY MATERIAL: The wood grabber is made of high quality plastic material which is durable enough to work for many times without damage. Durable materials give the clamp a long service life. Adjustable angle clamp: suitable for plates and T-joints from 5 to 22 mm thick, and also suitable for connecting two plates of different thicknesses, which saves working time and reduces working difficulties. Easy to use: the right angle assembly clips have strong and light springs that help them hold in place and give your parts a nice 90 degree angle when gluing/drilling or screwing. Included in the package: a set of 4 corner clips to save work time and reduce surface work. Simple and quick fastening of boards and frames at a 90 angle. Versatile use: the versatile corner clip fasteners are suitable for woodworking, cabinet repair connections and furniture, photo frame reinforcement, DIY wood projects. Size: 8.4*8CM Package includes: 4 * punch holder Note: The data is manual measurement, please allow 1-97cm error, due to the light and screen differences, there will be a certain color difference, the specific received in kind prevail.